package com.gec.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class ImgCodeVaildFilter implements Filter {

	@Override
	public void init(FilterConfig filterConfig) throws ServletException {
		// TODO Auto-generated method stub

	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
			throws IOException, ServletException {
		HttpServletRequest req = (HttpServletRequest) request;
		HttpServletResponse resp = (HttpServletResponse) response;

		if (req.getMethod().equalsIgnoreCase("post")) {
			String code = req.getParameter("imgCode");
			String stand = (String) req.getSession().getAttribute("imgStand");
			if (!code.equalsIgnoreCase(stand)) {
				req.setAttribute("error", "验证码错误");
				req.getRequestDispatcher("/WEB-INF/jsp/login.jsp").forward(req, resp);
				return;
			}
		}
		chain.doFilter(req, resp);

	}

	@Override
	public void destroy() {
		// TODO Auto-generated method stub

	}

}
